Adium for Mac is open source messaging client made using OS X Cocoa API that offers all Mac OS X users ability to use any number of messaging services in one simple and well-designed ecosystem. As many other popular multi-protocol chat clients, Adium strives not only to unify all your chat accounts into one easily manageable interface, but also to offer you services that can be used across all those accounts. Things like integration into Mac Address Book, themes for your chat windows, integrated file transfer, OTR encryption, tabbed chat windows, and much more. You can even directly receive updates from your Twitter account and reply with new messages. Off course, all your contacts from all your chat accounts are merged into one easy to use contact library, making locating of your chat partners extremely easy and intuitive.

By using popular libpurple protocol library, this very easy-to-use messaging program can connect you to dozens of popular chat services, from MSN, Google Talk, ICQ, Skype Facebook Chat, Yahoo! Messenger to the many other less known chat protocols such as Tlen, Lotus Sametime, Gadu-Gadu, and others. As of early 2014, the latest version Adium for Mac requires users to have Mac OS X 10.6.8 or newer, although older versions have support all the way down to Mac OS X 10.2.x and older. Since version 0.88, Adium is a universal application that works natively both on PowerPC and Intel-based Macintosh computers.

From the first version of Adium that appeared in late 2001 with support only for AIM chat system, this app managed to evolve into highly popular multi-protocol Instant messaging client that is today used all around the world on Mac.